A narrow trim or existing hole does not automatically provide adequate support. Wall construction, bracket loading and safe drilling locations need consideration. Explain known services and restrictions, and avoid removing finishes merely to provide a quotation photograph.
A blind ordered for a recess needs more than a rough outside width. Provide the supplier dimensions and opening measurements, including depth where relevant. Installation should not rely on cutting or adapting an unsuitable product after it arrives.
The fixing arrangement can change with the mounting style. Handles and opening sections may restrict clearance. Send a wide view of the window and the bracket instructions so the intended layout can be reviewed before marking fixing positions.
The agreed service covers measured product/bracket compatibility, supported fixing, operation and mandatory cord safety. Exclusions: Electrical motors/wiring, specialist custom manufacture, unsafe/incomplete cord systems, inaccessible work.